Sometimes, there is no fix. Sometimes, the servers are simply offline. Shinobi Striker is a niche anime game. The player count fluctuates wildly.
How to check before you troubleshoot:
Windows default settings can throttle P2P connections.
1. Set Network to "Private" If your network is set to "Public," Windows blocks incoming connections.
2. Flush DNS Cache
3. Change DNS Servers Sometimes ISP DNS servers are slow or unreliable.
1. Region Lock The game tends to lock you into the region of your Steam account or the server you initially connected to.
2. Enable "Strict NAT" Mode (If applicable) Some routers have a "Strict NAT" or "Secure NAT" mode enabled by default. You want to disable this in your router settings, not in the game. The game will tell you your NAT status in the Network Settings menu. You want it to say Open.
If you are still getting the "Server Disconnected" or "Failed to Join Room" error, run through this checklist:
Note on Server Status: Occasionally, the Steam authentication servers go down globally. You can check the Steam Stat website to see if the "Store" or "Community" servers are down. If Steam is down, no fix will work until they are back up.
If you insist on a cracked online fix (e.g., from Online-Fix.me or similar):
Shinobi Striker requires NAT Type 2 (Moderate) or NAT Type 1 (Open) . NAT Type 3 (Strict) will guarantee disconnects.